Mosquitoes

Invasive Aedes mosquitoes are not native to San Mateo County, California, or even North America. They do not belong in our ecosystems, and they can make people very uncomfortable because they bite during the day and even bite indoors. More importantly, they are a risk to human health because they can carry diseases that make people very sick, like Zika, chikungunya, dengue, and yellow fever.

Mosquitoes might seem like an annoying nuisance, but did you know they can transmit diseases that can make you sick? It only takes one bite from a mosquito infected with a disease like West Nile virus to put you at risk for serious illness.

How We Control Mosquitoes

Even when the risk of mosquito-borne illness is low here in San Mateo County, you may be at higher risk if you travel to other areas of the state, country, or world. If you’re infected with a mosquito-borne illness while traveling, there is a risk you could pass it on to local mosquitoes once you return home, and a local outbreak could occur. These tips will help you protect yourself and others from mosquito-borne illnesses during and after travel.